wpa_supplicant/main.c

   1 /*
   2  * WPA Supplicant / main() function for UNIX like OSes and MinGW
   3  * Copyright (c) 2003-2013, Jouni Malinen <j@w1.fi>
   4  *
   5  * This software may be distributed under the terms of the BSD license.
   6  * See README for more details.
   7  */
   8
   9 #include "includes.h"
  10 #ifdef __linux__
  11 #include <fcntl.h>
  12 #endif /* __linux__ */
  13
  14 #include "common.h"
  15 #include "wpa_supplicant_i.h"
  16 #include "driver_i.h"
  17 #include "p2p_supplicant.h"
  18
  19
  20 static void usage(void)
  21 {
  22         int i;
  23         printf("%s\n\n%s\n"
  24                "usage:\n"
  25                "  wpa_supplicant [-BddhKLqq"
  26 #ifdef CONFIG_DEBUG_SYSLOG
  27                "s"
  28 #endif /* CONFIG_DEBUG_SYSLOG */
  29                "t"
  30 #ifdef CONFIG_DBUS
  31                "u"
  32 #endif /* CONFIG_DBUS */
  33                "vW] [-P<pid file>] "
  34                "[-g<global ctrl>] \\\n"
  35                "        [-G<group>] \\\n"
  36                "        -i<ifname> -c<config file> [-C<ctrl>] [-D<driver>] "
  37                "[-p<driver_param>] \\\n"
  38                "        [-b<br_ifname>] [-e<entropy file>]"
  39 #ifdef CONFIG_DEBUG_FILE
  40                " [-f<debug file>]"
  41 #endif /* CONFIG_DEBUG_FILE */
  42                " \\\n"
  43                "        [-o<override driver>] [-O<override ctrl>] \\\n"
  44                "        [-N -i<ifname> -c<conf> [-C<ctrl>] "
  45                "[-D<driver>] \\\n"
  46 #ifdef CONFIG_P2P
  47                "        [-m<P2P Device config file>] \\\n"
  48 #endif /* CONFIG_P2P */
  49                "        [-p<driver_param>] [-b<br_ifname>] [-I<config file>] "
  50                "...]\n"
  51                "\n"
  52                "drivers:\n",
  53                wpa_supplicant_version, wpa_supplicant_license);
  54
  55         for (i = 0; wpa_drivers[i]; i++) {
  56                 printf("  %s = %s\n",
  57                        wpa_drivers[i]->name,
  58                        wpa_drivers[i]->desc);
  59         }
  60
  61 #ifndef CONFIG_NO_STDOUT_DEBUG
  62         printf("options:\n"
  63                "  -b = optional bridge interface name\n"
  64                "  -B = run daemon in the background\n"
  65                "  -c = Configuration file\n"
  66                "  -C = ctrl_interface parameter (only used if -c is not)\n"
  67                "  -i = interface name\n"
  68                "  -I = additional configuration file\n"
  69                "  -d = increase debugging verbosity (-dd even more)\n"
  70                "  -D = driver name (can be multiple drivers: nl80211,wext)\n"
  71                "  -e = entropy file\n");
  72 #ifdef CONFIG_DEBUG_FILE
  73         printf("  -f = log output to debug file instead of stdout\n");
  74 #endif /* CONFIG_DEBUG_FILE */
  75         printf("  -g = global ctrl_interface\n"
  76                "  -G = global ctrl_interface group\n"
  77                "  -K = include keys (passwords, etc.) in debug output\n");
  78 #ifdef CONFIG_DEBUG_SYSLOG
  79         printf("  -s = log output to syslog instead of stdout\n");
  80 #endif /* CONFIG_DEBUG_SYSLOG */
  81 #ifdef CONFIG_DEBUG_LINUX_TRACING
  82         printf("  -T = record to Linux tracing in addition to logging\n");
  83         printf("       (records all messages regardless of debug verbosity)\n");
  84 #endif /* CONFIG_DEBUG_LINUX_TRACING */
  85         printf("  -t = include timestamp in debug messages\n"
  86                "  -h = show this help text\n"
  87                "  -L = show license (BSD)\n"
  88                "  -o = override driver parameter for new interfaces\n"
  89                "  -O = override ctrl_interface parameter for new interfaces\n"
  90                "  -p = driver parameters\n"
  91                "  -P = PID file\n"
  92                "  -q = decrease debugging verbosity (-qq even less)\n");
  93 #ifdef CONFIG_DBUS
  94         printf("  -u = enable DBus control interface\n");
  95 #endif /* CONFIG_DBUS */
  96         printf("  -v = show version\n"
  97                "  -W = wait for a control interface monitor before starting\n"
  98 #ifdef CONFIG_P2P
  99                "  -m = Configuration file for the P2P Device interface\n"
 100 #endif /* CONFIG_P2P */
 101                "  -N = start describing new interface\n");
 102
 103         printf("example:\n"
 104                "  wpa_supplicant -D%s -iwlan0 -c/etc/wpa_supplicant.conf\n",
 105                wpa_drivers[0] ? wpa_drivers[0]->name : "nl80211");
 106 #endif /* CONFIG_NO_STDOUT_DEBUG */
 107 }
 108
 109
 110 static void license(void)
 111 {
 112 #ifndef CONFIG_NO_STDOUT_DEBUG
 113         printf("%s\n\n%s%s%s%s%s\n",
 114                wpa_supplicant_version,
 115                wpa_supplicant_full_license1,
 116                wpa_supplicant_full_license2,
 117                wpa_supplicant_full_license3,
 118                wpa_supplicant_full_license4,
 119                wpa_supplicant_full_license5);
 120 #endif /* CONFIG_NO_STDOUT_DEBUG */
 121 }
 122
 123
 124 static void wpa_supplicant_fd_workaround(int start)
 125 {
 126 #ifdef __linux__
 127         static int fd[3] = { -1, -1, -1 };
 128         int i;
 129         /* When started from pcmcia-cs scripts, wpa_supplicant might start with
 130          * fd 0, 1, and 2 closed. This will cause some issues because many
 131          * places in wpa_supplicant are still printing out to stdout. As a
 132          * workaround, make sure that fd's 0, 1, and 2 are not used for other
 133          * sockets. */
 134         if (start) {
 135                 for (i = 0; i < 3; i++) {
 136                         fd[i] = open("/dev/null", O_RDWR);
 137                         if (fd[i] > 2) {
 138                                 close(fd[i]);
 139                                 fd[i] = -1;
 140                                 break;
 141                         }
 142                 }
 143         } else {
 144                 for (i = 0; i < 3; i++) {
 145                         if (fd[i] >= 0) {
 146                                 close(fd[i]);
 147                                 fd[i] = -1;
 148                         }
 149                 }
 150         }
 151 #endif /* __linux__ */
 152 }
 153
 154
 155 int main(int argc, char *argv[])
 156 {
 157         int c, i;
 158         struct wpa_interface *ifaces, *iface;
 159         int iface_count, exitcode = -1;
 160         struct wpa_params params;
 161         struct wpa_global *global;
 162
 163         if (os_program_init())
 164                 return -1;
 165
 166         os_memset(&params, 0, sizeof(params));
 167         params.wpa_debug_level = MSG_INFO;
 168
 169         iface = ifaces = os_zalloc(sizeof(struct wpa_interface));
 170         if (ifaces == NULL)
 171                 return -1;
 172         iface_count = 1;
 173
 174         wpa_supplicant_fd_workaround(1);
 175
 176         for (;;) {
 177                 c = getopt(argc, argv,
 178                            "b:Bc:C:D:de:f:g:G:hi:I:KLm:No:O:p:P:qsTtuvW");
 179                 if (c < 0)
 180                         break;
 181                 switch (c) {
 182                 case 'b':
 183                         iface->bridge_ifname = optarg;
 184                         break;
 185                 case 'B':
 186                         params.daemonize++;
 187                         break;
 188                 case 'c':
 189                         iface->confname = optarg;
 190                         break;
 191                 case 'C':
 192                         iface->ctrl_interface = optarg;
 193                         break;
 194                 case 'D':
 195                         iface->driver = optarg;
 196                         break;
 197                 case 'd':
 198 #ifdef CONFIG_NO_STDOUT_DEBUG
 199                         printf("Debugging disabled with "
 200                                "CONFIG_NO_STDOUT_DEBUG=y build time "
 201                                "option.\n");
 202                         goto out;
 203 #else /* CONFIG_NO_STDOUT_DEBUG */
 204                         params.wpa_debug_level--;
 205                         break;
 206 #endif /* CONFIG_NO_STDOUT_DEBUG */
 207                 case 'e':
 208                         params.entropy_file = optarg;
 209                         break;
 210 #ifdef CONFIG_DEBUG_FILE
 211                 case 'f':
 212                         params.wpa_debug_file_path = optarg;
 213                         break;
 214 #endif /* CONFIG_DEBUG_FILE */
 215                 case 'g':
 216                         params.ctrl_interface = optarg;
 217                         break;
 218                 case 'G':
 219                         params.ctrl_interface_group = optarg;
 220                         break;
 221                 case 'h':
 222                         usage();
 223                         exitcode = 0;
 224                         goto out;
 225                 case 'i':
 226                         iface->ifname = optarg;
 227                         break;
 228                 case 'I':
 229                         iface->confanother = optarg;
 230                         break;
 231                 case 'K':
 232                         params.wpa_debug_show_keys++;
 233                         break;
 234                 case 'L':
 235                         license();
 236                         exitcode = 0;
 237                         goto out;
 238 #ifdef CONFIG_P2P
 239                 case 'm':
 240                         iface->conf_p2p_dev = optarg;
 241                         break;
 242 #endif /* CONFIG_P2P */
 243                 case 'o':
 244                         params.override_driver = optarg;
 245                         break;
 246                 case 'O':
 247                         params.override_ctrl_interface = optarg;
 248                         break;
 249                 case 'p':
 250                         iface->driver_param = optarg;
 251                         break;
 252                 case 'P':
 253                         os_free(params.pid_file);
 254                         params.pid_file = os_rel2abs_path(optarg);
 255                         break;
 256                 case 'q':
 257                         params.wpa_debug_level++;
 258                         break;
 259 #ifdef CONFIG_DEBUG_SYSLOG
 260                 case 's':
 261                         params.wpa_debug_syslog++;
 262                         break;
 263 #endif /* CONFIG_DEBUG_SYSLOG */
 264 #ifdef CONFIG_DEBUG_LINUX_TRACING
 265                 case 'T':
 266                         params.wpa_debug_tracing++;
 267                         break;
 268 #endif /* CONFIG_DEBUG_LINUX_TRACING */
 269                 case 't':
 270                         params.wpa_debug_timestamp++;
 271                         break;
 272 #ifdef CONFIG_DBUS
 273                 case 'u':
 274                         params.dbus_ctrl_interface = 1;
 275                         break;
 276 #endif /* CONFIG_DBUS */
 277                 case 'v':
 278                         printf("%s\n", wpa_supplicant_version);
 279                         exitcode = 0;
 280                         goto out;
 281                 case 'W':
 282                         params.wait_for_monitor++;
 283                         break;
 284                 case 'N':
 285                         iface_count++;
 286                         iface = os_realloc_array(ifaces, iface_count,
 287                                                  sizeof(struct wpa_interface));
 288                         if (iface == NULL)
 289                                 goto out;
 290                         ifaces = iface;
 291                         iface = &ifaces[iface_count - 1];
 292                         os_memset(iface, 0, sizeof(*iface));
 293                         break;
 294                 default:
 295                         usage();
 296                         exitcode = 0;
 297                         goto out;
 298                 }
 299         }
 300
 301         exitcode = 0;
 302         global = wpa_supplicant_init(&params);
 303         if (global == NULL) {
 304                 wpa_printf(MSG_ERROR, "Failed to initialize wpa_supplicant");
 305                 exitcode = -1;
 306                 goto out;
 307         } else {
 308                 wpa_printf(MSG_INFO, "Successfully initialized "
 309                            "wpa_supplicant");
 310         }
 311
 312         for (i = 0; exitcode == 0 && i < iface_count; i++) {
 313                 struct wpa_supplicant *wpa_s;
 314
 315                 if ((ifaces[i].confname == NULL &&
 316                      ifaces[i].ctrl_interface == NULL) ||
 317                     ifaces[i].ifname == NULL) {
 318                         if (iface_count == 1 && (params.ctrl_interface ||
 319                                                  params.dbus_ctrl_interface))
 320                                 break;
 321                         usage();
 322                         exitcode = -1;
 323                         break;
 324                 }
 325                 wpa_s = wpa_supplicant_add_iface(global, &ifaces[i], NULL);
 326                 if (wpa_s == NULL) {
 327                         exitcode = -1;
 328                         break;
 329                 }
 330         }
 331
 332         if (exitcode == 0)
 333                 exitcode = wpa_supplicant_run(global);
 334
 335         wpa_supplicant_deinit(global);
 336
 337 out:
 338         wpa_supplicant_fd_workaround(0);
 339         os_free(ifaces);
 340         os_free(params.pid_file);
 341
 342         os_program_deinit();
 343
 344         return exitcode;
 345 }